11421223774221 has 4 divisors (see below), whose sum is σ = 15228298365632. Its totient is φ = 7614149182812.

The previous prime is 11421223774111. The next prime is 11421223774237. The reversal of 11421223774221 is 12247732212411.

11421223774221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11421223774221 - 2³⁰ = 11420150032397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11421223774221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11421223774241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1903537295701 + ... + 1903537295706.

It is an arithmetic number, because the mean of its divisors is an integer number (3807074591408).

Almost surely, 2^{11421223774221} is an apocalyptic number.

It is an amenable number.

11421223774221 is a deficient number, since it is larger than the sum of its proper divisors (3807074591411).

11421223774221 is an equidigital number, since it uses as much as digits as its factorization.

11421223774221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807074591410.

The product of its digits is 75264, while the sum is 39.

Adding to 11421223774221 its reverse (12247732212411), we get a palindrome (23668955986632).

The spelling of 11421223774221 in words is "eleven trillion, four hundred twenty-one billion, two hundred twenty-three million, seven hundred seventy-four thousand, two hundred twenty-one".